Rails 4: around_generate sometimes not being called

[til]

With the following setup on rails 4, the around_generate method is not called for url helper methods such as products_path. It is being called as expected for an equivalent url_for call though.

module RoutingFilter
  class Translate < Filter
    ...
    def around_generate(params, &block)
      yield.tap do |result|
        puts 'should be called'
      end
    end
  end
end

MyApp::Application.routes.draw do
  filter :translate
  resources :products
end

products_path # => around_generate was not called
url_for(controller: 'products', action: 'index') # => around_generate was called

It seems to be related to optimized url helper methods, and the following monkey patch makes RoutingFilter behave as expected:

ActionDispatch::Routing::RouteSet::NamedRouteCollection::UrlHelper.class_eval do
  def self.optimize_helper?(route)
    false
  end
end

I don't understand the rails routing internals enough to know what's going on here, but hope there's a better solution than this monkey patch.

[dark-panda]

I am seeing this behaviour as well. This appears to occur OptimizedUrlHelper calls ActionDispatch::Http::URL.url_for directly rather than through ActionDispatch::Routing::RouteSet#url_for, which in turn the generate method that routing-filter hooks into. OptimizedUrlHelper bypasses that generate call altogether and skips right to ActionDispatch::Http::URL.url_for.

[brega]

+1

[brett-bender]

+1

[aripollak]

Two other options:

• If you populate default_url_options, the optimized url helper is not used.
• You can define optimize_routes_generation? on your controller(s) to decide dynamically whether or not the routing filter can be skipped.

[debreczeni]

:+1:

[alepore]

related: https://github.com/rails/rails/issues/12178